#include <stdio.h>
int main(int argc , const char * argv() )
{
    int a=7 ,b;
    float x=2.5,y=4.7,s;
    s=x+a%3*(int)(x+y)%2/4;//a后按顺序算
    printf("s=%f\n",s);
    b=(int)(x+y);    //x+y=7.2  (int)(x+y)=7
    printf("%d\n",b);
     b=a%3*(int)(x+y)%2/4;
    printf("%d\n",b);
   
    return 0;

}